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Which planet has the coldest average cloud-top temperature?
SpacePlanets
Quick Answer
Uranus is the coldest planet in the Solar System, with cloud-top temperatures dropping to about -224°C (-371°F). That is colder than Neptune, even though Neptune is farther from the Sun.
The Full Story
Uranus is the coldest known planet in the Solar System by measured cloud-top temperature. Its atmosphere can fall to around -224°C, which is extremely close to the theoretical lower limit for naturally occurring planetary temperatures. Scientists think Uranus's unusual interior heat flow may help explain why it is colder than Neptune, even though Neptune is farther away from the Sun. The planet's extreme tilt also gives it highly unusual seasons.
Key Facts
1.Uranus temperature: about -224°C
2.Uranus's axial tilt is about 98 degrees
3.It is colder than Neptune in cloud-top temperatures
YouTube Angle
Suggested video title for this topic:
"The coldest planet is not the farthest one—and the reason is bizarre."